On-chip current sensing employing power distribution network voltage de-convolution

A system-on-chip device, comprising:

• a voltage plane configured to carry an analog voltage signal derived from a power distribution network;
• analog-to-digital logic configured to convert the analog voltage signal to a digital voltage signal;
• de-convolution logic configured to recover a current signal, drawn by the system-on-chip device, from the digital voltage signal based at least in part on inverse convolution coefficients stored within memory of the system-on-chip device and derived from the power distribution network in a first clock domain, wherein the de-convolution logic uses the inverse convolution coefficients, the voltage signal, and a convolution operator to determine the current signal;
• synchronization logic configured to convert the current signal from the first clock domain in which the current signal was outputted to a second clock domain to synchronize the current signal with the second clock domain for adjusting a parameter of the power distribution;
• and
• power management logic configured to:
• determine a power consumption of the system-on-chip device based upon the current signal;
• and
• adjust at least one of a clock rate of the system-on-chip device or a supply voltage provided by the power distribution network to the voltage plane based upon the power consumption to reduce an amount of electrical power consumed by the system-on-chip device.

A method comprising:

• measuring a voltage signal on a voltage plane of a system-on-chip device during operation of the system-on-chip device, wherein the voltage signal derives from a power distribution network;
• de-convolving the voltage signal, based at least in part on inverse convolution coefficients stored within memory of the system-on-chip device and derived from the power distribution network, to recover a current signal being drawn by the system-on-chip device from the power distribution network in a first clock domain, wherein de-convolution logic uses the inverse convolution coefficients, the voltage signal, and a convolution operator to determine the current signal, wherein the de-convolving comprises:
• converting the current signal from the first clock domain in which the current signal was outputted to a second clock domain to synchronize the current signal with the second clock domain for adjusting a parameter of the power distribution network;
• determining a power consumption of the system-on-chip device based upon the current signal;
• and
• adjusting at least one of a clock rate of the system-on-chip device or a supply voltage provided by the power distribution network to the voltage plane based upon the power consumption to reduce an amount of electrical power consumed by the system-on-chip device.